Cutting-machine.



G. NIST. CUTTING MACHINE.

APPLICATION FILED PEBJI, 1913.

Patented Mar. 31, 1914.

UNITED STATES PATENT GFFICE,

GEORG vNAST, OF MUNICH, GERMANY, ASSIGNOR TO MASCHINENEABRIK MNCHEN, KOMMANDITGESELLSCHAFT, 0F MUNICI-I, GERMANY.

CUTTING-MACHINE.

Specification of Letters Patent.

Patented Mar. 31, 1914.

Application led February 11, 1913. Serial No. 747,728.

To all whom it may concern Be it known that I, GEORG Nasr, a subject of the German Emperor, and residing at Munich, Bavaria, German Empire, have invented certain new and useful Improvements in Cutting-Machines, of which the following is a specification.

The present invention has reference to improvements in cutting machines, and relates more specifically to a machine` for cut-- ting up material in leaves or sheets, such as bundles of superimposed tobacco leaves, or stacks 'of paper sheets for making the socalled pack-wool, and the invention essentially consists in means for quickly revolving a circular edge-tool and oscillating` it past the throat of the feed table through the projecting material to be cut, in means for reversing thel rotation of the edge-tool for each cutting operation, and in timed means for clamping the material during the cutting operation proper and for releasing it immediately thereafter, so that jamming of the material on feeding is prevented.

The machine is especially adapted for cutt-ing raw tobacco, since heavy twists or bundles of it can readily be cut up with comparatively little power, without requirn ing the injurious moistening and the strong pressure necessary with most of the cutters now in use. The cut material, owing to the absence of moisture and clamping pressure, can be worked up at once without needing a special after-treatment in loosening-up ap* paratus.

The shape of the edge-tool, its drive and its travel can be varied from that shown in the drawings; the knife, for instance, can be traveled horizontally, vertically, slantingly or in the arc of a circle. For obitaining a clean, drawing cut and for enhancing the efficiency of the machine the direction of the knife is preferably reversed after each cutting operation.

In order to make the invention more readily understood, I will now describe it with reference to the accompanying drawings, in which- Figure 1 represents a side elevation of the machine; Fig. 2 shows a top view thereof, and Fig. 3 a vertical section through the throat of the feeding table with adjacent arts.

The disk knife a is journaled in the lower end of a pendulum arm Z), which is pivoted to the machine frame at o and to which is imparted an oscillatory movement by the crank-gear d, c which in turn is actuated from the pulley if fast on shaft 5. On rotation of the latter the knife c` is reciprocated in the manner of a pendulum past the throat s of the feed table, through which the material g is fed. The knife is driven forward or backward in keeping with the forward or backward swing of its support bythe toothed gearing It, z'. The pendulum arm b and t-he toothed segment /L are fixed on a. common sleeve, which rides on shaft 0, to which latter are secured the wheels m, 'n for rope, belt or chain drive. The toothed wheel and the drive wheel 0 are fast on the shaft y). vThese pulleys or chain wheels are operatively connected by belts, ropes or chains .70, Z, as t-he case may be. Upon the arm being oscillated by the crank movement d, c the toothed segment h aotuates the toothed wheel t' and with it the drive wheel 0,' and then through the driving means Z, n, m', 7c, the drive wheel g is operated on whoseA shaft ris fixed the knife (t, so that the latter isrotated always in the sense of the direction of swing of the pen` dulum arm.

The feed of the material through the throat s is obtained in any suitable manner, for instance as shown in F ig. 3 by means of endless aprons t, a. rIhe upper jaw j of the throat is vertically displaceable, and its operation for clamping the material during the actual cutting operation and for releasing it right after for feeding purposes can be brought about in any suitable manner, for instance by means of eccentrics, lever gear, rack and pinion movement, or the like.

As shown by way of example, the upper jaw of the throat forms the lower edge of a plate w, which latter is reciprocated in guidecheeks e by the eccentric y journaled in the machine frame M and operated by the lever m. The latter is connected to the lever l, pivoted to the machine frame, by means of the connecting rod e. A roller 2 on the lever 1 cooperates with the cam disk 4, and a draw spring 3, secured with one end to the machine frame and with the other to the lever w, tends to always return the parts into the initial position. Upon the cam disk 4, fast on shaft 5 of the main driving pulley f, rotating, the lever gear l, e m is actuated, causing the panel fw with its pressing edge y' to reciprocate vertically so timed that during each cutting operation the material is clamped, but is released again right after, so that then the material may freely be fed forward the desired extent without jamming, before the movement of the pendulum` arm and the rotation of the edge-tool is reversed.

What I claim is 1. In a cutting machine of the type 'set said pendulum arm, comprising a main shaft, a sleeve loosely mounted thereon, said pendulum arm and a toothed segment fast on said sleeve, two pulleys on said shaft, one at each end thereof,` a second shaft, a

' pulley and a toothedwheel lfast on said second shaft and said toothed wheel meshing with said toothed segment, and endless connecting means between said pulleys on the main shaft and the pulley on said?y second shaft and said pulley at the lower pendulum arm end respectively.

2. In a cutting machine of the type set forth, in combination, an oscillating pendulum arm, an edge tool at the lower end thereof, means for reversing the rotary cutting movement of said tool for each reversal of movement of said penduluml arm, comprisleys on the main shaft and the pulley on theV second shaft and the pulley at the lower pendulum arm respectively 5, means for periodically clamping the Vwork material,

comprising a feed table, guide cheeks rising from' said table, a presser block vertically displaceable in said 'guide cheeks, a lever eccentrica-Hy journaled withiits lower end in `the upper part of said presserv block, a rocking lever, pivoted at its lower end'to the machine frame, a roller on said rocking lever, and Vrotary cam means, coperat-ing with said roller and adapted torock said rocking lever in timed relation to the swing operation of said pendulum arm, a rod connectingl the upper endsrespectively of said two levers, and means for continuously keeping said cam and roller mea-usm operative contact; andV means for feeding the f work material underneath said'presser block.

In testimony whereof I affix my signature in presence of two witnesses. i

' GEORG NAST.

Witnesses: t Y

RICHARD Lnuig' JOHANNAA STERN;

kGomes of this patent may be obtained'for ve cents each, byladdiressing theV Commissioner of Patenti.

' Washington, D. C. 

